SDS Volume (2409)
Volume 60. Halogenated Methanes with Water, p None
Original Measurements
Hunter-Smith, R. J.; Balls, P. W.; Liss, P. S.; Tellus 35B, 170 (1983).
Variables:
Room Temp: 283 - 298 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
The multiple equilibrium technique was used to measure the Henry's law constant as described elsewhere [1]. A known volume of seawater in a syringe was shaken with a known volume of trichloromethane. After equilibration, the headspace was separated and analyzed for trichloromethane. A gas chromatograph fitted with an electron capture detector was used for the analysis.
Source and Purity of Materials:
- Source and purity not given.
- Samples from 48° N to 65° S in the Atlantic in late 1981.
Estimated Errors:
Ambient temperature: ±0.2 K.
Mass concentration (m/v) (1): ±5.5% std. dev.
References
1 McAuliffe, C. D.; Chem. Techn. 1971, 1, 46.
Components:
- Trichloromethane, $\ce{ CHCl3 }$; [67-66-3] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The Henry's law constants (dimensionless) were derived from the best-fit lines of van't Hoff plots:
| $T$ (°C) | 100w1 | $x_{1}$ | $k_{\rm{D}}$ (m3 atm mol-1) |
|---|---|---|---|
| 10 | 0.6500 | 9.864 x 10-4 | 0.1046 |
| 15 | 0.6470 | 9.818 x 10-4 | 0.1309 |
| 20 | 0.6428 | 9.753 x 10-4 | 0.1624 |
| 25 | 0.6377 | 9.675 x 10-4 | 0.2001 |
